Question

Which of the following transport mechanisms will be affected most directly by a temporary shortage of ATP molecules inside the cell?A) The movement of water molecules through aquaporinsB) The diffusion of oxygen molecules across the plasma membraneC) The transport of glucose molecules against a concentration gradientD) The facilitated diffusion of Ca+ ions into the cell

Answer 1

C

ATP is usually used in processes and biochemical reactions in the body that would not occur spontaneously hence require energy to proceed them forward.

Explanation:

One such process is the transport of molecules against the concentration gradient. This is akin to climbing a hill. The channels that carry the molecule against concentration gradient require energy in carrying the molecule from the low concentration outside the cell to high concentration inside the cell. This is called active transport. Facilitated diffusion use membrane channels too, but no ATP energy is consumed because the molecules are moving down concentration gradient.

Learn More:

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